Add writeAttachmentData module

test/app/types/attachment/write_attachment_data_test.js

@@ -0,0 +1,58 @@
+const FSE = require('fs-extra');
+const isEqual = require('lodash/isEqual');
+const Path = require('path');
+const stringToArrayBuffer = require('string-to-arraybuffer');
+const tempy = require('tempy');
+const { assert } = require('chai');
+
+const {
+  writeAttachmentData,
+  _getAttachmentName,
+  _getAttachmentPath,
+} = require('../../../../app/types/attachment/write_attachment_data');
+
+
+describe('writeAttachmentData', () => {
+  let TEMPORARY_DIRECTORY = null;
+  before(() => {
+    // Sync!
+    TEMPORARY_DIRECTORY = tempy.directory();
+  });
+
+  after(async () => {
+    await FSE.remove(TEMPORARY_DIRECTORY);
+  });
+
+  it('should write file to disk and return path', async () => {
+    const input = stringToArrayBuffer('test string');
+    const tempDirectory = Path.join(TEMPORARY_DIRECTORY, 'writeAttachmentData');
+    const expectedPath = Path.join(
+      tempDirectory,
+      'd55/d5579c46dfcc7f18207013e65b44e4cb4e2c2298f4ac457ba8f82743f31e930b'
+    );
+
+    const outputPath = await writeAttachmentData(tempDirectory)(input);
+    const output = await FSE.readFile(outputPath);
+
+    assert.strictEqual(outputPath, expectedPath);
+
+    const inputBuffer = Buffer.from(input);
+    assert.isTrue(isEqual(inputBuffer, output));
+  });
+
+  describe('_getAttachmentName', () => {
+    it('should return correct name', () => {
+      const input = Buffer.from('test string', 'utf8');
+      const expected = 'd5579c46dfcc7f18207013e65b44e4cb4e2c2298f4ac457ba8f82743f31e930b';
+      assert.strictEqual(_getAttachmentName(input), expected);
+    });
+  });
+
+  describe('_getAttachmentPath', () => {
+    it('should return correct path', () => {
+      const input = Buffer.from('test string', 'utf8');
+      const expected = 'd55/d5579c46dfcc7f18207013e65b44e4cb4e2c2298f4ac457ba8f82743f31e930b';
+      assert.strictEqual(_getAttachmentPath(input), expected);
+    });
+  });
+});